A cursory scan of the study suggest that (at 392 pages), it is a rich source of data and probably of continuing interest, so I have added it to the blog’s references page. I’ll try to give a more in depth review later. I have also added an earlier report–GAO briefing slides for Congressional Committees, April 20, 2012, “Observations on the Coast Guard’s and the Department of Homeland Security’s Fleet Studies”[PDF]
The study helps explain the apparent cancellation of NSCs #7 and 8, in that the DHS study finds very little difference in mission performance between NSCs and OPC, to justify the NSCs apparently much higher price, but it also leaves room for a revision of this decision because, they expect not building NSCs would reduce the fleet’s capabilities at least into the 2030s. The study recognized there remain many unknowns and at least to some extent recognizes the urgency of replacing the cutter fleet, so, at least to my reading, it identifies no definitive single best course of action.